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1N4257
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Product Detailed Parameters
- Description：DIODE STD 3000V 250MA S AXIAL
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：3000 V
- Current - Average Rectified (Io)：250mA
- Voltage - Forward (Vf) (Max) @ If：3.5 V @ 100 mA
- Speed：Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：1 µA @ 3000 V
- Capacitance @ Vr, F：-
- Mounting Type：Through Hole
- Package / Case：S, Axial
- Supplier Device Package：S, Axial
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N4257 is a high-voltage rectifier diode designed for demanding applications. It features a peak repetitive reverse voltage of 10,000 V and an average forward rectified current rating of 100 mA. The device utilizes voidless-glass construction to ensure hermetic sealing, providing robust performance in environments where failure is not an option. It operates within a junction temperature range of -65°C to +175°C.
Feature Summary
- Hermetically sealed with voidless-glass construction for high reliability
- Rated for extreme high-voltage operation up to 10,000 V
- Military qualified per MIL-PRF-19500/279 specifications
Applications
- High-voltage power supplies
- X-ray equipment
- Industrial control systems requiring high reliability
Procurement Notes
Verify the specific revision level and qualification status against the latest manufacturer datasheet before integration. Confirm that the through-hole S-package axial lead configuration matches the target PCB layout requirements. Ensure thermal management strategies account for the specified operating temperature range during system design validation.
Selection Notes
Select this component when application requirements demand extreme reverse voltage blocking capabilities combined with hermetic sealing standards. It is suitable for designs prioritizing long-term reliability in harsh environments over cost-sensitive commercial alternatives. Evaluate the 100 mA current limit against peak load conditions to prevent overstress.
Part Context
This part belongs to the 1N3643–1N3647 and 1N4254–1N4257 series of standard recovery high-voltage rectifiers. These components are engineered for critical systems where electrical isolation and physical durability are paramount. The series shares common manufacturing processes focused on voidless-glass encapsulation techniques.
Replacement Considerations
Direct substitutes must match the 10,000 V reverse voltage and 100 mA current ratings while maintaining hermetic sealing. Verify pinout compatibility and package dimensions for existing footprints.
